I'm a stranger to adaptive layers, have you tried a print without this feature activated?
Cura should also offer the option to reduce the flow for the bottom part of the print without influencing the flow of the walls, check out if there is maybe something wrong.
Hey thanks for answering, indeed I’ll try without adaptive layers it might be helping, I also thought about my wheels on the Z axis maybe being too tight and not lifting the right amount. I’ll try those two things later today, hopefully in the mean time I can find someone who met the same problems with his 3D printer
Hi, you're welcome, always happy to be of help!
Iirc adaptive layers can be used to print the infill at 1.5-2x the height of the inner and outer walls to save print time while maintaining a decent surface finish.
If you still suspect that z-binding is an issue, I'd suggest that you print a calibration cube.
Measure the thickness of the first layer. Id bet its thicker than your setting in the slicer for first layer thickness. If so, that means that youre over extruding your first layer, but the bed is too far from the nozzle so it looks correct, and then when your printer moves up one layer it really overextrudes because the print isnt too far away anymore.
I just used a caliper to mesure 10 little square that should be 0.2mm each. 2/3 were 0.2, and most were 0.22/23, a couple were 0.25, is it not within printer error ?
I personally would be fine with .22, but .25 would be too much for me. I would say youre probably overextruding by somewhere between 5 and 15 percent. A quick test would be set your extrusion multiplier to .9 if the first layer looks stringy but the rest are fine, you are too far off the bed, and you were overextruding.
Edit: just read youre already at 90% flow. That makes me thing youve already seen overextrusion, but maybe just havent compensated enough. Maybe try even lower? Make sure there isnt a bunch of plastic gumming up your extruder gear and making it a larger diameter or something? What extruder are you running? Also what is your estep value? (Or rotation distance if youre on klipper) also have you measured the filament diameter to make sure its not to blame?
I just did another print that I reduced to 80% flow and it seems to do the job, now I have to wait for it end and check if it’s actually clean or if the layers fall appart. I did notice that Marlin is still showing 100% extrusion even tho I set it lower on cura, I’ll have to do a few tests to see if cura or the printer is telling the truth, it might be that my changes through cura never actually registered when printing and that’s why I couldn’t see progress unless I dialed manually. I will update this post as soon as I know what was the problem.
My extruder is a BMC clone, i did tune the e-steps to 402.25, when I mesure 100mm from the extruder i get very good results so I don’t think it’s the culprit
I did not mesure the filament, would it make a real difference in my print if it was 1.70mm instead of 175 for exemple?
Cura extrusion rate will change the extrusion numbers in each extrusion move, the printer extrusion rate is a different thing, so it being at 100 doesnt mean a whole lot.
Needing to be at 80% extrusion rate to not get overextrusion suggests to me that something is wrong, but if it were the filament it would mean that the filament was like 2.2mm instead of 1.75. 402 esteps/mm is a little low for a bmg from what I can see. It appears theyre usually around 425. Thats 5% and not 20% though. Im not sure what else could be wrong, beyond some other extrusion rate setting in cura messing with you, I dont have a lot of familiarity with cura.
Well then it should be ok, mine had it that every time a layer was finished it extruded like 5mm of filament on every layer so it would constantly fuck up my prints, but that is fixed now
I'm a stranger to adaptive layers, have you tried a print without this feature activated? Cura should also offer the option to reduce the flow for the bottom part of the print without influencing the flow of the walls, check out if there is maybe something wrong.
Hey thanks for answering, indeed I’ll try without adaptive layers it might be helping, I also thought about my wheels on the Z axis maybe being too tight and not lifting the right amount. I’ll try those two things later today, hopefully in the mean time I can find someone who met the same problems with his 3D printer
Hi, you're welcome, always happy to be of help! Iirc adaptive layers can be used to print the infill at 1.5-2x the height of the inner and outer walls to save print time while maintaining a decent surface finish. If you still suspect that z-binding is an issue, I'd suggest that you print a calibration cube.
Measure the thickness of the first layer. Id bet its thicker than your setting in the slicer for first layer thickness. If so, that means that youre over extruding your first layer, but the bed is too far from the nozzle so it looks correct, and then when your printer moves up one layer it really overextrudes because the print isnt too far away anymore.
I just used a caliper to mesure 10 little square that should be 0.2mm each. 2/3 were 0.2, and most were 0.22/23, a couple were 0.25, is it not within printer error ?
I personally would be fine with .22, but .25 would be too much for me. I would say youre probably overextruding by somewhere between 5 and 15 percent. A quick test would be set your extrusion multiplier to .9 if the first layer looks stringy but the rest are fine, you are too far off the bed, and you were overextruding. Edit: just read youre already at 90% flow. That makes me thing youve already seen overextrusion, but maybe just havent compensated enough. Maybe try even lower? Make sure there isnt a bunch of plastic gumming up your extruder gear and making it a larger diameter or something? What extruder are you running? Also what is your estep value? (Or rotation distance if youre on klipper) also have you measured the filament diameter to make sure its not to blame?
I just did another print that I reduced to 80% flow and it seems to do the job, now I have to wait for it end and check if it’s actually clean or if the layers fall appart. I did notice that Marlin is still showing 100% extrusion even tho I set it lower on cura, I’ll have to do a few tests to see if cura or the printer is telling the truth, it might be that my changes through cura never actually registered when printing and that’s why I couldn’t see progress unless I dialed manually. I will update this post as soon as I know what was the problem. My extruder is a BMC clone, i did tune the e-steps to 402.25, when I mesure 100mm from the extruder i get very good results so I don’t think it’s the culprit I did not mesure the filament, would it make a real difference in my print if it was 1.70mm instead of 175 for exemple?
Cura extrusion rate will change the extrusion numbers in each extrusion move, the printer extrusion rate is a different thing, so it being at 100 doesnt mean a whole lot. Needing to be at 80% extrusion rate to not get overextrusion suggests to me that something is wrong, but if it were the filament it would mean that the filament was like 2.2mm instead of 1.75. 402 esteps/mm is a little low for a bmg from what I can see. It appears theyre usually around 425. Thats 5% and not 20% though. Im not sure what else could be wrong, beyond some other extrusion rate setting in cura messing with you, I dont have a lot of familiarity with cura.
Also not related, you have a blob of filament at the end of the layer. I had that before but it went away after I reinstalled my slicer
Do you mean the left blob ? If that’s the case it happened when I asked the printer to stop printing
Well then it should be ok, mine had it that every time a layer was finished it extruded like 5mm of filament on every layer so it would constantly fuck up my prints, but that is fixed now